Dimplex DFI400L User manual

Service Manual
Model Part Number
DFI400L 6909050241
DFI400R 6909050242
DFI600L 6909050261
7400770000R00
In keeping with our policy of continuous product development, we reserve the right to make changes without notice.
© 2013 Dimplex North America Limited
Dimplex North America Limited
1367 Industrial Road Cambridge ON Canada N1R 7G8
1-888-346-7539 www.dimplex.com
REV PCN DATE
00 - 1-NOV-13
IMPORTANT SAFETY INFORMATION: Always read this manual rst before attempting to service this cassette. For your
safety, always comply with all warnings and safety instructions contained in this manual to prevent personal injury or prop-
erty damage.

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Always use a qualied technician or service agency to repair this cassette.
!NOTE: Procedures and techniques that are considered important enough to emphasize.
CAUTION: Procedures and techniques which, if not carefully followed, will result in damage to the equipment.
WARNING: Procedures and techniques which, if not carefully followed, will expose the user to the risk of re, serious
injury, or death.
Operation ...........................................................3
Maintenance.........................................................4
Exploded Parts Diagram...............................................5
Replacement Parts List................................................5
Wiring Diagram ......................................................6
Remote Control Receiver Replacement ..................................7
Power Board Replacement ............................................7
Switch Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Potentiometer Replacement ...........................................8
Power Cord Replacement..............................................8
Light Assembly Replacement ..........................................8
Fan Assembly Replacement............................................8
Troubleshooting Guide ...............................................10
TABLE OF CONTENTS

3
Remote Control
The On/Off Switch must be in the ‘ON’ ( I ) position in order
for the remote control to operate. (Figure 2)
!NOTE: To operate correctly, the remote control must be
pointed towards the remote control sensor.
To operate, push the ON button to turn replace on, push
the Standby button to turn the replace off.
Battery Replacement
To replace the battery:
1. Slide battery cover open on the remote control (Figure
2).
2. Install two 1.5 Volt (AAA) batteries in the battery holder.
3. Close the battery cover.
Battery must be recycled or disposed of properly.
Check with your Local Authority or Retailer for recy-
cling advice in your area.
OPERATION
Figure 1
!NOTE: Always ensure that the appliance is in an upright
position before operating the unit.
!NOTE: When the cassette is used in an environment
where background noise is very low, it may be possible to
hear a sound which is related to the operation of the ame
effect. This is normal and should not be a cause for con-
cern.
!NOTE: Always ensure that the appliance is in a level
position.
The manual controls for the cassette are located on the top
of the unit, below the control cover. (Figure 1)
A. On/Off Switch
Supplies power to the cassette.
B. Mode Selector Switch
Press once to turn on the ame effect. This will be indicated
by an audible “beep”. Although the lights turn on immedi-
ately it will take 30 seconds before the ame effect starts.
Press to put re in to standby mode. This will be indi-
cated by one “beep”.
C. Flame Intensity Control
Adjusts the intensity of the ame effect when the cassette
has been activated.
Turning the control knob clockwise to decrease the inten-
sity of the ame effect. Turning the control knob counter-
clockwise will increase the ame effect.
!NOTE: Give the ame generator some time to react to
changes you may make on the ame control knob.
!NOTE: When the water tank is empty the unit will turn
off after 30 seconds. See instructions under Maintenance
Section for relling tank. When this procedure is complete,
the main lamps will illuminate but it will take 30 seconds
before the ames return.
Figure 2
BA
C
Remote Control
Sensor
Battery Cover
Standby
Button
On
Button

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MAINTENANCE
WARNING: Disconnect power before attempting any main-
tenance or cleaning to reduce the risk of re, electric shock
or damage to persons.
Filling the water tank
When the water tank is empty, the ame shuts off and you will
hear 2 audible beeps, follow these steps.
CAUTION: Allow at least ve minutes for components to
cool before disassembling the unit to rell.
1. Turn the On/Off switch to the off position (0) (Figure 1)
2. Gently remove the media tray and media (if applicable)
and place them carefully on the ground.
3. Remove the rell container by lifting upwards and out-
wards.
4. Rell the container with tap water.
!NOTE: Normal tap water can be used in the Optimyst®
as long as the tap water is not considered to be hard water.
In the event your tap water is hard, you may use softened
water or distilled water with 1/8 tsp of salt (0.5 mL) added to
the water reservoir. (The addition of additional salt should
only be when you notice that the unit is not producing mist as
expected.)
5. Screw the cap back on, do not overtighten.
6. Return the rell container to the water tank.
7. Gently place the media tray and media (if applicable) back
into position.
8. Turn the On/Off switch to the off position (I). (Figure 1)
If you do not intend on using the unit for longer than 2 weeks,
empty and drain the unit of water, and dry all of the water con-
taining components.
Replacing the Light bulbs
If a large amount of the ame appears grey or colourless it
may be that one or more of the light bulbs have burnt out.
CAUTION: Allow at least twenty minutes for light bulbs to
cool before touching bulbs to avoid accidental burning of skin.
Light bulb requirement: 45W, 12VAC halogen bulbs type MR
16. Contact Dimplex Technical Service at 1-888-346-7539 for
replacement bulbs.
1. Leaving the ame effect on, remove the media (if appli-
cable), tray and water tank (Figure 3) and lift out the top
cover.
2. View the lamps from a distance in front of the re and
observe which lamp needs to be changed.
3. Turn the unit off, and unplug the cassette.
4. Leave the appliance for 5 minutes to allow the lamps to
cool down before removing them.
5. Remove the water tank and top cover (Figure 3) by lifting
upwards and place in a sink.
6. Remove the defective bulb, by gently lifting vertically and
disengaging the pins from the lamp holder.
7. Carefully insert the two pins of the new bulb into the two
holes in the lamp holder. Push lamp rmly in place.
8. Gently place the media tray and media (if applicable) back
into position.
Cleaning
It is recommended that all of the components that contain
water are cleaned with soap and water on a biweekly basis.
A small brush has been included to assist in cleaning difcult
items/areas, i.e. the transducer.
CAUTION: Do not put plastic components in the dish-
washer.
Filter Cleaning
The air lter can be removed and gently rinsed with water to
clean and dried on a towel before reinstalling.
!NOTE: Replace the lter so that the course black lter is
facing the front of the cassette.
Surface Cleaning
Use a warm damp cloth only to clean surfaces of the cassette.
Do not use abrasive cleaners.
!NOTE: If you need to move the unit ensure that all of the
components that contain water have been emptied before re-
locating.
Servicing
Except for installation and cleaning described in this manual,
an authorized service representative should perform any other
servicing.
Figure 3
Top
Cover
Transducer
Emitter
Wire Slot
Retaining
Tab
Fan
Housing
Water Tank

5
EXPLODED PARTS DIAGRAM
REPLACEMENT PARTS LIST
1. Remote Control..................9600800100RP
2. Remote Control Receiver ..........9600580200RP
3. Rock Media (DFI400RH). . . . . . . . . . . 9600650100RP
4. Media Tray (DFI400RH) ...........9600710100RP
5. Log Set Assembly - DFI400LH ......9600720100RP
- DFI600LH ......9600730100RP
6. Light Holder Assembly ............9600610200RP
7. Removable Rell Container with Cap 0441440100RP
8. Cap for Rell Container. . . . . . . . . . . . 0441440300RP
9. Top Cover Assembly ..............9600670100RP
10. Water Tank . . . . . . . . . . . . . . . . . . . . . 0441380100RP
11. Fan Assembly . . . . . . . . . . . . . . . . . . . 5300300100RP
12. Fan Housing Assembly . . . . . . . . . . . . 9600540100RP
13. Fan Filter. . . . . . . . . . . . . . . . . . . . . . . 8600300100RP
14. Transducer .....................3800040100RP
15. Power Cord . . . . . . . . . . . . . . . . . . . . . 9600740100RP
16. On/Off Switch ...................9600383500RP
17. 3-Position Switch ................9600383600RP
18. Transformers. . . . . . . . . . . . . . . . . . . . 9600690100RP
19. Potentiometer ...................9600640100RP
20. Power Board . . . . . . . . . . . . . . . . . . . . 9600590100RP
21. IR Receiver with Lens . . . . . . . . . . . . . 9600600200RP
22. Light Bulbs (Package of 4) ................RB400
6
1
2
3
4
57
89
10
11
12
13
14
15
16
17
18
19
20
21
22

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WIRING DIAGRAM
TRANSDUCER
MALE JACK
DC FAN
MOTOR
WHITE
MAINS
3 CORE
CABLE
BLACK
WHITE

7
REMOTE CONTROL RECEIVER
REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Remove the 4 screws around the remote control re-
ceiver attaching it to the unit.
4. Transfer the wire connectors from the terminals on the
original board to the same location on the replacement
board.
!NOTE: Use a at head screwdriver to gently pry
between the end of the connector and the remote control
receiver to release the wires.
5. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
POWER BOARD REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Remove the 4 screws around the power board attach-
ing it to the unit.
4. Transfer the wire connectors from the terminals on the
original board to the same location on the replacement
board.
!NOTE: Use a at head screwdriver to gently pry
between the end of the connector and the remote control
receiver to release the wires.
5. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
TRANSFORMER REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
Figure 4
Front Grille
Transformers
Power Board
Remote Control
Receiver
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Remove the screws that secure the transformer to the
unit.
4. Transfer the wire connectors from the terminals on the
original board to the same location on the replacement
board.
!NOTE: Use a at head screwdriver to gently pry
between the end of the connector and the remote control
receiver to release the wires.
5. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
SWITCH REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Locate the defective switch and disconnect the wiring
connections noting their original locations.
!NOTE: A at head screwdriver can be used to gently
pry between the end of the connector and the switch to
release the wires.
4. Depress the retainer clips on the rear of the switch and

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push the switch out through the opening.
5. Properly orient and insert the new switch and connect
all of the wiring.
6. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
POTENTIOMETER REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
3/8” (10mm) Wrench
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Turn the unit so that the underside of the potentiometer
can be seen.
4. Loosen the securing nut, to allow the potentiometers
slide out.
5. Disconnect the wiring connections noting their original
locations.
!NOTE: A at head screwdriver can be used to gently
pry between the end of the connector and the switch to
release the wires.
6. Slide the potentiometer back into the assembly and
tighten the securing nut.
7. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
POWER CORD REPLACEMENT
Tools Required: Philips head screwdriver
Flat head screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Remove the 4 screws that secure the front grill to the
cassette housing. (Figure 4)
3. Locate the cord and disconnect the wiring connections
noting their original locations.
!NOTE: A at head screwdriver can be used to gently
pry between the end of the connector and the switch to
release the wires.
4. With needle nose pliers, grasp the cord strain relief
grommet from inside the back of the bottom panel and
push while twisting to remove.
5. Install the new cord.
6. Reassemble in the reverse order as above.
LIGHT ASSEMBLY REPLACEMENT
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Disassemble the sump components. (Figure 3)
3. With the unit turned upside down, remove the 2 screws
that hold the light assembly to the unit. (Figure 5)
4. Remove the light assembly and replace with the new
light assembly.
5. Reattach the wire onto the new light assembly.
6. Re-assemble the remainder of the cassette in reverse
order from the instructions above.
FAN ASSEMBLY REPLACEMENT
Fan Motor and Fan Housing
Tools Required: Philips head screwdriver
Flat Head Screwdriver
WARNING: Disconnect power before attempting any
maintenance to reduce the risk of electric shock or damage
to persons.
!NOTE: Ensure that all of the components that
contain water have been emptied before performing any
maintenance.
Figure 5

9
Figure 6
1. Disconnect and remove the media from the unit and
put them in a safe place.
2. Disassemble the sump components. (Figure 3)
3. Remove the 3 screws that hold the cover onto the fan
housing. (Figure 6)
4. Remove the fan motor out of the housing and discon-
nect the wiring connection located near the bottom of
the housing.
5. If replacing only the motor, attach new motor and reas-
semble the remainder of the cassette in revers order
from the instructions above.
• If replacing the housing, remove the 3 screws attaching
the base to the cassette. (Figure 6)
6. Attach new fan housing base to the cassette.
7. Transfer the lter from the old housing to the new hous-
ing.
8. Reinstall the fan motor and reconnect the wire.
9. Re-assemble the remainder of the cassette in reverse
order from the instructions above.

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PROBLEM CAUSE SOLUTION
General
Unpleasant smell when unit is
used.
Dirty or stale water. Clean the unit as described under maintenance.
Appearance
Fireplace does not turn on Manu-
ally
Improper operation Refer to Operation Section
No incoming voltage from the electrical wall
socket
Check Fuse/Breaker Panel
Defective 3 Position Switch Replace 3 Position switch
Fireplace does not turn on with
the Remote Control
Improper operation Refer to Operation Section
The batteries in the remote control are dead. Install new battery into the remote control
Defective remote control Replace Remote Control
Defective remote control receiver Replace remote control receive
Defective IR sensor Replace IR sensor
The ame effect will not start Switch A is in the ‘ON’ (I) position, but mode
Switch B has not been pressed.
Press Switch B once for ame effect.
Low water level. Check the water tank is full and there is water in
the sump.
Water in unit is too cold Allow water to warm to room temperature.
If using distilled or reverse osmosis water, unit
will not produce a consistent mist
Add 1/8 tsp of table salt to water reservoir to
introduce electrolytes, only repeat when mist is
not being produced correctly
Check that the fan is operating correctly Replace fan assembly
Ensure that the air lter is clean and dry
Cord is located over emitter on transducer Relocate cord so that mist is free to rise off of
transducer.
Defective Transducer Replace Transducer
The ame effect is too low. Flame effect control knob is set too low. Increase level of ame by turning Control knob
C to the left slowly.
The ame effect has too much
smoke.
Flame effect setting is too high. Turn the ame effect Control knob “C” to the
right until it is at minimum and slowly turn to the
left, about ¼ a turn, at a time. Give the ame
generator some time to adjust before increas-
ing.
Mist is not coming out and the red
light by the transducer is not on
The cord from the power board is not working Ensure that the cord is not pinched.
Ensure that the cord is fully inserted into the
connection on the power board.
Mist is coming out fast Filter is missing off of Fan Housing Replace Fan Filter
Mist does not appear to be com-
ing out evenly
Unit is not level Level unit
Media is blocking air ow Rearrange media
A light bulb is burnt out Replace light bulb
TROUBLESHOOTING GUIDE